The sickening feeling you wake up with when you have partied too hard the night before. Regretting the crazy thing(s) you did last night and feeling very bad about yourself. Related to drinking, hookups, drugs, ect.

"Hey, wasn't Alexa's party fun the other night! Yeah! It was wild"

"Yeah it was fun, but the next morning I had such a morality hangover"

The sickening feeling you get when you wake up after a party or otherwize crazy night. You feel okay until you suddenly remember what you did the night before. Except bedrest and pepto bismol wont fix this one. Questionable hookups, an unknown venue, random writing on your body, unexplained costumes, and a real hangover often accompany this. Most often your first words of the morning are "what the hell did I do last night?"

Hey that party was awesome last night! You hooked up with so many people! You were crazy.
-Tell me about. This morning I had the worst morality hangover when I woke up handcuffed to my dining room table wearing some other guys's boxers.